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David is a nickel short

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by sanju09 » Thu Jul 22, 2010 4:27 am
David has 11 more nickels than quarters. How many coins does he have?

(1) The total value of David's coins is $2.65?

(2) The total value of the quarters with David is a nickel short of 18 dimes.

[spoiler]Source: made by me for

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by kvcpk » Thu Jul 22, 2010 5:40 am
No idea of How many nickels make one dollar :(
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by sanju09 » Thu Jul 22, 2010 5:57 am
kvcpk wrote:No idea of How many nickels make one dollar :(
All GMATiers must note:

One Dollar = 100 cents = 20 Nickels = 10 Dimes = 4 Quarters
The mind is everything. What you think you become. -Lord Buddha



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by reegent.9 » Thu Jul 22, 2010 6:19 am
i guess ans. should be A.... is tat correct????
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by kvcpk » Thu Jul 22, 2010 6:38 am
David has 11 more nickels than quarters. How many coins does he have?
Assume x quarters, y nickels
y = x +11

(1) The total value of David's coins is $2.65?
x(1/4) + y(1/20) = 2.65
5x+y = 53
y-x=11

2 eqtns, 2 variables.. x, y can be determined.
SUFF

(2) The total value of the quarters with David is a nickel short of 18 dimes.
x/4 = 18/10-1/20
x/4=35/20
x=7
hence y=18
SUFF

pick D
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by reegent.9 » Thu Jul 22, 2010 7:19 am
o...okkk got it!!!...thank u for t reply nd explanation
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by singhpreet1 » Thu Jul 22, 2010 11:10 pm
sanju09 wrote:
kvcpk wrote:No idea of How many nickels make one dollar :(
All GMATiers must note:

One Dollar = 100 cents = 20 Nickels = 10 Dimes = 4 Quarters
this is a very specific question with regards to the American currency which not all people around the world who would be taking the GMAT can be expected to be aware of.

Preet
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